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Novel Flame-retardant Epoxy Composites Based on Zinc Methylethyl Phosphinate  
Novel Flame-retardant Epoxy Composites Based on Zinc Methylethyl Phosphinate
資料類型: PDF文件
關(guān)鍵詞: zinc  dialkylphosphinate  flame  retardant  epoxy  resin  thermal  
stability  
資料大?。?/td> 110K
所屬學(xué)科: 分子表征
來源: 第六屆亞歐研討會上處理和性能增強(qiáng)聚合物會議文集(2013.6.2-6 武漢)
簡介:
Printedwiringboard(PWB)isthekeycomponentintheelectronicitem.Forthesafetyreason,PWBsmaterialsarerequiredtomeetdefinedflameretardancystandardssuchasUL94-VOratingcl].Epoxyresins(EP)arewidelyusedasresinbackboneforPWBbasematerials.Metalphosphinatesareanewclassofflameretardants.Inthepaper,EPcontainingzincmethylethylphosphinate(Zn(MEP》wereprepared.ThestructureofZn(MEP)wasconformedwithFTIR,IHNMR,3IPNMR,XRFandXRD.TheflameretardancyandthermalpropertiesofZn(MEP)/EPwereanalyzedbyalimitingoxygenindex(LOI),UL-94test,TG,FTIR,SEM-EDXaswellasDSC.ActivationenergyforthedecompositionofsamplewasobtainedusingtheKissingerequation.Zn(MEP)isahalogen-freeflameretardantwithacrystallinestructure.Itisathermallystablecompoundbelow4060C.Adding10wt%ofZn(MEP)causestheLOIofEPtoincreasefrom20.1%t026.6%.15一poundunderTi20wt%ofZn(MEP)canprovidesatisfactoryflameretardancy.ThecharobtainedbyheatingisverysmoothandcondensedandrichinP-andC-containingcomponents.Onthesurfaceofthechar,theatomicratioofP/Znisreducedcomparedtooriginalmaterial.Condensedcharlayerturnsouttobeofmostimportancefortheflameretardantperformance.TheP-andC-richcomponentsaswellasloweratomicratioofP/ZnonthecharsurfaceimpliesthattheZn(MEP)actsasbothcondensedphaseandgasphase.AddingZn(MEP)changesthemaindecompositionprocessoftheEPslightly,resultinginareductioninTi,anincreaseindecompositionactivationenergyandcharyield.Inaddition,theTgofEPcompositesisincreasedby200C一280CwithZn(MEP)contentvaryingfrom10wt%t025wt%.Comparingtocommercialproductsuchasaluminumphosphinates,Zn(MEP)haslessnegativeinfluenceontheinitialdecompositiontemperatureofEPandtheinteractionbetweenpolymerandadditivesismoreprominentinZn(MEP)filledEPsystem.Inaddition,Zn(MEP)filledEPshowshigherTgbutlowerLOIandcharforming.
作者: H. Wang, X. Q. Liu,J. Y. Liu, H. Zhou, S. J. Cai
上傳時(shí)間: 2013-07-04 13:29:45
下載次數(shù): 1
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